Loading bucket hoist



Feb. 18, 1958 Filed March 12, 1956 E. w. POTTMEYER LOADING BUCKET HOIST 2 Sheets-Sheet l INVENTOR.

Feb. 18, 1958 E. w. POTTMEYER 2,323,819

LOADING BUCKET HOIST 2 Sheets-Sheet 2 Filed March 12, 1956 INVENTOR. [award/77 0M United States Patent C LOADING BUCKET HOIST Edward W. Pottmeyer, Pittsburgh, Pa., assignor to Blaw- Knox Company, Pittsburgh, Pa., a corporation of Delaware Application March 12, 1956, Serial No. 570,888

4 Claims. (Cl. 214-700) This invention relates to a new and improved loading bucket hoist and more particularly to such apparatus designed for application to various types of material handling and storage machinery.

There are numerous types of material handling apparatus which include elevated hoppers from which material is delivered by gravity to feeding or distributing devices located under the bin. It is necessary to elevate the material to store it in the bin and in many cases it is desirable to have such elevating mechanism directly asso ciated with the bin and movable or portable therewith.

It is an object of the present invention to provide a new and improved material elevating bucket construction.

It is a further object to provide such a construction which is compact with small lateral clearance requirements and capable of elevating material a substantial distance with the apparatus working within a relatively small height above the receiving hopper.

It is an additional object to provide apparatus of this character which is capable of receiving material adjacent the related hopper and lifting it and discharging it into the hopper.

It is also an object to provide this type of apparatus operable to lift material from in front of the apparatus and deliver it behind the apparatus by a continuous lifting and swinging movement.

It is another object to provide such apparatus which is simple in design and construction and adapted for commercial production and for use with various types of hoppers or material receiving apparatus.

Other and further objects will appear as the description proceeds.

I have shown certain preferred embodiments of my invention in the accompanying drawings in which- Figure 1 is a side elevation of the bucket hoist associated with a hopper and a vibrating delivery device;

Figure 2 is a plan view of the construction shown in Figure 1;

Figure 3 is a fragmentary plan view of the connection of a cable to a sheave; and

Figure 4 is a front elevation of the bucket hoist as seen from the left of Figure 1 and shown on an enlarged scale.

In the construction shown, the hopper 11 is shown as supported from a suitable framework 13 which also supports the vibrating discharge pan 15. This pan 15 is supported on the vibrating shaft 17 of the vibrator motor 19. The vibrator motor and pan are supported on spring cushioned hangers 21 and 23. The pan 15 discharges into chute 25. The details of construction of this portion of the apparatus form no part of the present invention, but are shown to disclose a typical installation with which the bucket hoist is suitable for use.

The bucket hoist comprises the side frame members 31 and 33 which have inturned vertical flanges 35 and 37, respectively. The angle irons 39 and 41 are secured in 2,823,819 Patented Feb. 18, 1958 position, as best shown in Figure 2, to combine with flanges 35 and 37 to provide vertical tracks to receive the rollers 43 and 45. These rollers are carried on the stub shafts 47 and 49, best shown in Figure 4. The stub shafts extend from the yoke 51 which is connected by cross pin 53 to the piston rod 55 which extends from the pneumatic cylinder 57.

The sheaves 59 and 61 are mounted to rotate freely on the stub shafts 47 and 4%. The cable 63 has its lower end connected to the eye 65, the eye being positively secured to the lower frame member 66 of the bucket hoist assembly. The cable 63 passes up and over the sheave 59 from behind, as seen in Figure 4, and downwardly in front around the sheave. At the point 67, shown in Figure 1, the cable 63 is clamped to the sheave 59 by means of the clamp 69, shown in detail in Figure 3. This clamp 69 is secured to the face of the sheave by boits 71 and 73. The cable 63 then passes upwardly behind the sheave 59 and laterally across the upper arcuate surface of a fixed support member 75, as best shown in Figure 4. The free end of cable 63 then passes downwardly to the eye '77 which is permanently secured to an intermediate portion of the framework 79. about sheave 61 is extended about sheave 61, is clamped thereto and has its ends secured in the same manner as cable 63.

The sheave 61 has the arm 83 permanently secured thereto as best shown in Figures 1 and 2. The sheave 59 has a similar arm 85 secured thereto and extending parallel to arm 83. These arms are permanently secured to the bucket 87, as clearly shown in Figure l. The bucket 87 is shown as having the open face 89 for receiving and discharging the material to be elevated.

In the operation of the apparatus, the normal or loading position is shown in Figure 1. pressure to the cylinder 57 below the piston therein will elevate the piston rod 55 and thrust the yoke 51 upwardly. This yoke carries with it the sheaves 5? and 61, these being guided in their upward movement by the rollers 43 and 45 on the ends of the stub shafts 4'7 and 49. The sheaves, therefore, move directly upwardly. The cables 63 and 81 cause the sheaves 59 and 61 to rotate in the clockwise direction, as seen in Figure l, as they are moved upwardly thus lifting and swinging the arms 83 and 85 and bucket 87. At the upper limit of movement the bucket 87 reaches the dotted line position of Figure l, at which time material contained therein is discharged into the hopper 11.

By reversing the pressure in the cylinder 57 the parts will return to the full line position of Figure 1. It will be noted that in the entire operation the sheaves 59 and 61 rotate only slightly more than degrees. The clamp 69 on each sheave is located substantially 270 degrees around the sheaves from the initial point of contact of the lower portion of the cables 63 and 81 to the sheaves. Consequently, these clamps do not in any way interfere with the operation. The upper runs of cables 63 and 81 wrap around the sheaves as they rise.

The cables, of course, do not slide around the upper supports 75. The reason for reversing the direction of the cables around these arcuate supports 75 is first of all to save the headroom which would be required if the eye-bolts 77 were in line with the sheaves similar to the disposition of eye-bolts 65 at the other end of the cable, and secondly, to avoid interference between such anchorage supporting structure for the upper end of the cables and the arms 83 and $5 as they descend toward discharge position of the loading hoist. The eye-bolts at both ends provide for taking up slack in the cables initially and from time to time as the cables may stretch in service. It is preferable to have the cables under The cable 81 passing Application of air some initial tension, "but the hoist is not-rendered inoperative by a little slack in the cables which merely has the eifect of introducing a slight lag in the rotation with respect to energization of the power cylinder.

Theapparatus is comparatively simple inconstruction with but few solidly constructed moving parts operated by -.a single fluid pressure cylinder. It will be apparent that the 'various dimensions and the amount of the lift may be varied to satisfy different applications .Of the apparatus. Other features may also be varied to meet differing conditions and requirements and I therefore contemplate such modifications as come within the spirit and scope of the appended claims.

I claim:

1. 1A loading bucket hoist comprising a frame having spaced vertically extending guideways, a yoke member providing axles which extend laterally into the guideways for guiding the said yoke member during up and down vertical movement, a sheave mounted for rotation on each of .said axles, arms extending from the sheaves, a vbucket secured to the arms, a cable extending around each sheave and having its ends anchored above and .below the sheave respectively, and power means conmeeting with the yoke member for reciprocating the same to impart vertical reciprocating movement to the sheaves,

Wherebyas the sheaves move bodily the said cables cause said sheai'es to rotate so that a lifting and a swinging movement about the moving axes of the sheaves is imparted to the bucket.

2. A loading bucket hoist comprising a frame providing .spaced vertically extending guideways, a yoke member having axles extending laterally into the guideways on respective sides of the member whereby said yoke member is guided in its up and down vertical movement, a sheave journalled on each of said axles, a bucket, means extending from each sheave and disposed on rcspective sides of the bucket and fixed thereto, a cable extending around each sheave and having :its ends anchored above and below the sheave respectively, and power means connecting with the yoke member for reciproeating *the same to impart vertical reciprocating movement to the shea es, hereby as he sh aves move bodil the said cables cause said sheaves to rotate approximately 180 degrees for each reciprocating stroke of the power means so that swinging movement is imparted to said bucket, and whereby said bucket is caused to move from a position below the axles on one side of the guideways to a position above the axles on the opposite side of the guideways for :a full stroke of the ,power means in an upward direction.

3. A *loading bucket :hoist comprising a 'frame having spaced vertical guideways, a yoke having axles extend ing therefrom and guided by the guideways for vertical movement athcrein, sheaves on the afiXlQS, rarms extending from the sheaves, .a bucket secured to the arms, a fluid operated piston connected tot'he yoke to move the axles vertically in the guideways, and means for rotating the sheaves on the axles during said vertical movement.

4- A i10fiS1lIAg bUK :hQ i ompri ing a trams hav n p ced v ioahsuidewavsha yoke havin axles extend n therefmm an eluded by t :suideway o vertica movement therein, sheaves on -.th e.axles, arms extending from the sheaves, a-bncket sccuredzto 1th? arms,.rneans vtor v ng h axles ert a ly in he i u deways, and eans for mia rig th she ves idw-Ting said verti al, movemen said last named m ans co pr s g cabl s havi g an or ions fixed to th fr me and ex en ing aroun the sheaves and parallel to the guideways, the cables extends round the sheaves i-rt rsubsta tia ly 569 de ree an being positively secured to the zsheaves ,at an intermediate point.

References Cited in the file of this vpatent 'UNI'IZED STATES .RATENTS 793,700 'Wh'i-ttemore July 4', 1-905 1,100,241 Hoster June 16, 19.14 1,787,716 :fBeckwith Jan. 6, 1931 1906;000 Finlay et al. Apr. 25, 1933 $467,029 -Greenway .Apr. 12, 1949 

